Can we use multiple line types in same order

Hi,

We had a business scenario where two business  process items needs to be in one Sales order. and we need seperate line wise accounting to AR for the same.

Can anybody guide me how to do that.. [ i.e one sales order , having two different line item type but invoice should be one but line wise accounting should be different.

For Eg.

Sales order had standared order type, having line item 1 as solution business item and Item 2 as Flow business .

When we generate Invoice we need accounting of item item 1, should be seperate and Item 2 should be seperate to AR.